<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>页面结构</title>
</head>
<body>
    <header>

        <h2>网页头部</h2>
    </header>

    <section>
        <h2>网页主体</h2>
    </section>

    <footer>
        <h2>网页脚部</h2>
    </footer>
</body>
</html>